Gas mask



FIG. 1 is a perspective view of a gas mask in the open position showing my new design

FIG. 2 is a side view of the gas mask in the open position.

FIG. 3 is a side view of the gas mask in the closed position.

FIG. 4 is a front view of the gas mask in the closed position.

FIG. 5 is a perspective view of the gas mask in the closed position.

FIG. 6 is a top view of the gas mask in the closed position.

FIG. 7 is an underside view of the gas mask in the closed position; and,

FIG. 8 is an underside perspective view of the gas mask in the closed position. 

The ornamental design for a gas mask, as shown and described. 